|On the separation of boundary layers - Sandborn, V. A|
No Abstract Available
Keywords: BOUNDARY LAYERS
|Similar boundary layer solutions for combined forced and free convection - Eichhorn, R.|
No Abstract Available
Keywords: BOUNDARY LAYERS; FORCED CONVECTION; FREE CONVECTION
|THE INFLUENCE OF THE WIND ON THE ERROR AND PROBABILITY OF LOCALIZATION - NON|
THE SYSTEMATIC ERROR IN LOCATING THE SOUNDING BALLOON CAUSED BY THE INFLUENCE OF THE WIND IS DISCUSSED IN TERMS OF THE DISPLACEMENT DURING THE INTERVALS BETWEEN INTERROGATIONS. THE ERRORS INTRODUCED BY WINDS PARALLEL TO THE TRACE, WINDS PERPENDICULAR TO THE TRACE, INDETERMINATE WINDS, AND WIND DIRECTION ARE ANALYZED. IT IS CONCLUDED THAT IF ONLY ERRORS OF DISTANCE ARE CONSIDERED, IT IS ADVANTAGEOUS TO INCREASE THE INTERVAL BETWEEN INTERROGATIONS...
Keywords: BARRIER LAYERS; SEMICONDUCTORS (MATERIALS); BOUNDARY LAYERS; ELECTRODES; POINT DEFECTS; RECTIFIERS
|Compressible turbulent boundary layers with heat transfer and pressure gradient in flow direction (Volume 63B) - Walz, Alfred|
Journal of Research of the National Bureau of Standards
Keywords: Boundary layers; empirical laws; heat transfer; pressure gradient
|GENERALIZATION OF BOUNDARY-LAYER MOMENTUM-INTEGRAL EQUATIONS TO THREE-DIMENSIONAL FLOWS INCLUDING THOSE OF ROTATING SYSTEM - Mager, A|
No Abstract Available
Keywords: BOUNDARY LAYERS; NAVIER-STOKES EQUATION; ROTATION; THREE DIMENSIONAL FLOW
|Free-Spinning-Tunnel Investigation of a 1/17 Scale Model of the Cessna T-37A Airplane - Bowman, James S., Jr.|
Results of an investigation of a dynamic model in the Langley 20-foot free-spinning tunnel are presented. Erect spin and recovery characteristics were determined for a range of mass distributions and center-of-gravity positions. The effects of lateral displacement of the center of gravity, engine rotation, nose strakes, and increased rudder area were investigated.
Keywords: BOUNDARY LAYERS; STRUTS; VENTILATION; YAW; CAVITIES; REYNOLDS NUMBER
|Center for Advanced Space Propulsion Second Annual Technical Symposium Proceedings - NON|
The proceedings for the Center for Advanced Space Propulsion Second Annual Technical Symposium are divided as follows: Chemical Propulsion, CFD; Space Propulsion; Electric Propulsion; Artificial Intelligence; Low-G Fluid Management; and Rocket Engine Materials.
Keywords: FLOW DISTRIBUTION; IMAGING TECHNIQUES; RAYLEIGH SCATTERING; SUPERSONIC BOUNDARY LAYERS; THREE DIMENSIONAL FLOW; THREE DIMENSIONAL MODELS; BOUNDARY LAYERS; SHOCK WAVES; SUPERSONIC INLETS
|Investigation of radiation of a dense plasma obtained by the detonation of a fine wire in a vacuum - Ryazin, A. P., et al|
Investigation of radiation of dense plasma obtained by detonation of fine wire in vacuum chamber
Keywords: AIR SAMPLING; HIGH TEMPERATURE; SPECTRUM ANALYSIS; ABSORPTION SPECTRA; BOUNDARY LAYERS; SHOCK WAVES
|Boundary-layer-transition measurements in full-scale flight - Banner, R. D.|
No Abstract Available
Keywords: BOUNDARY LAYERS; LAMINAR FLOW; SUCTION; TURBULENCE EFFECTS; BOUNDARY LAYER TRANSITION; JOUKOWSKI TRANSFORMATION; PRESSURE DISTRIBUTION
|Building a Multi-Discipline Digital Library Through Extending the Dienst Protocol - Nelson, Michael L.|
The purpose of this project is to establish multi-discipline capability for a unified, canonical digital library service for scientific and technical information (STI). This is accomplished by extending the Dienst Protocol to be aware of subject classification of a servers holdings. We propose a hierarchical, general, and extendible subject classification that can encapsulate existing classification systems.
Keywords: BASE FLOW; COMPUTERIZED SIMULATION; PRESSURE MEASUREMENT; SHOCK TUNNELS; BOUNDARY LAYERS; PRESSURE SENSORS; TEST CHAMBERS
|Differential equations of the equilibrium states of thin elastic shells in the postcritical stage - Alumyae, N. A|
No Abstract Available
Keywords: FLAT PLATES; RAREFIED GASES; VISCOUS FLOW; AERODYNAMICS; BOUNDARY LAYERS; FLUID MECHANICS; GAS DYNAMICS
|Disk mass densities in edge-on spiral galaxies - Rupen, Michael P|
Very Large Array (VLA) observations of the neutral hydrogen (HI) gas in two nearby edge-on spirals (NGC 4565 and NGC 891) successfully resolve the thickness of the gas layers in both disks over a wide range in radii. The combination of B, C, and D array data produces a 4 arcsec (approx. 200 pc) beam and 21 km s(exp -1) velocity resolution, combined with sensitivity to structures as large as 18 arcmin (approx...
Keywords: DIFFUSION; TURBULENCE EFFECTS; DRAG REDUCTION; FRICTION REDUCTION; HYDRODYNAMICS; LIQUID FLOW; RIBLETS; SKIN FRICTION; BOUNDARY LAYERS; GROOVES
|Processing eutectics in space - Douglas, F. C.|
Studies which have been done in an earth-based laboratory environment have generally not yielded specimens with the degree of perfection required of the eutectic microstructure to provide test data to evaluate their nonstructural applications. It has been recognized that the low-g environment of an orbiting space laboratory provides a unique environment to re-examine the process of solidification with the goal of producing better microstructures...
Keywords: HEAT TRANSFER; TROPOSPHERE; BOUNDARY LAYERS; CLOUD COVER; HEAT FLUX; WEATHER FORECASTING
|Hypersonic nonviscous radiant gas flow past a cone (obtekaniye konusa giperzvukovym potokom nevyazkogo isluchayushchego gaza) - Kolton, G. A|
Determining effect of radiant gas on hypersonic flow around cone using boundary layer method
Keywords: BOUNDARY LAYERS; GAS FLOW; HYPERSONIC FLOW; BOUNDARY LAYER; GAS FLOW; HYPERSONIC FLOW
|PHASE TRANSFORMATIONS DURING THERMAL TREATMENT OF ALLOY VT18 - KOROBOV, O. S.|
THE VT18 ALLOY WAS INVESTIGATED DURING HEAT TREATMENT, AND IT WAS SHOWN THAT AT TEMPERATURES BELOW 930 DEG, THE ALPHA SUB 2-PHASE AND SOME OF THE BETA-PHASE ARE PRESENT, APART FROM THE ALPHA-MATRIX. DURING AGING, THE CHANGES ARE DETERMINED BY THE FORMATION OF THE ORDERED ALPHA SUB 2-PHASE. AFTER LONGER EXPOSURE, THE BETA-PHASE DECOMPOSES. THE INSTABILITY OF VT18, AT WORKING TEMPERATURES, IS DUE TO THE ORDERING OF THE ALPHA-SOLID SOLUTION AND DECOMPOSITION OF THE BETA-PHASE.
Keywords: DRAG; NONLINEAR EQUATIONS; PROBLEM SOLVING; TRANSONIC FLOW; BOUNDARY LAYERS; NUMERICAL ANALYSIS; SHOCK DISCONTINUITY
|Upper-Stage Flight Experiment - Anderson, W. E.|
For propulsion applications that require that the propellants are storable for long periods, have a high density impulse, and are environmentally clean and non-toxic, the best choice is a combination of high-concentration hydrogen peroxide (High Test Peroxide, or HTP) and a liquid hydrocarbon (LHC) fuel. The HTP/LHC combination is suitable for low-cost launch vehicles, space taxi and space maneuvering vehicles, and kick stages...
Keywords: NOZZLE DESIGN; WIND TUNNEL NOZZLES; FLOW DISTRIBUTION; INVISCID FLOW; REAL GASES; OPTIMIZATION; SIMPLIFICATION; BOUNDARY LAYERS
|Aerodynamic analysis of the solid propellant booster deceleration subsystem drop tests - NON|
No Abstract Available
Keywords: FLASHBACK; LIQUID FUELS; SPRAY CHARACTERISTICS; BOUNDARY LAYERS; FLAMES; JET ENGINE FUELS
|Role of groundwater in formation of Martian channels - Howard, Alan D|
A global 3-D model of groundwater flow has been used to study possible behavior of groundwater on Mars and its role in creating fluvial features. Conclusions drawn from an earlier 2-D groundwater model are supplemented and expanded. Topical headings are discussed as follows: timescales of groundwater flow; wet areas on Mars and location of outflow channels; implications for valley networks; the enigma of Hellas; absence of fluvial or periglacial features on Syrtis Major; development of chaotic t...
Keywords: CALIBRATING; CASCADE FLOW; FLOW MEASUREMENT; FLOW VELOCITY; LASER ANEMOMETERS; TURBOMACHINERY; VELOCITY MEASUREMENT; AIRCRAFT ENGINES; BOUNDARY LAYERS
|Protection of naval engineer personnel against heat - Bernardini, A.|
Protective clothing for naval engineer personnel against heat
Keywords: FLOW DISTRIBUTION; HEAT TRANSFER; LEADING EDGES; BOUNDARY LAYERS; FLAT PLATES; GROOVES; HYPERSONIC FLOW; IMPINGEMENT; SWEEPBACK
|UTILIZATION OF SOLAR ENERGY - OSHIDA, I|
COMMENTS ARE PRESENTED ON AN INTERNATIONAL CONFERENCE CONCERNED WITH SOLAR ENERGY UTILIZATION. THE DIFFICULTIES OF HARNESSING SOLAR ENERGY ARE OUTLINED IN TERMS OF THREE BASIC PROPERTIES: (1) HIGH DILUTION, (2) INTERMITTENT NATURE, AND (3) HIGH ENTROPY. THE CURRENT STATE AND FUTURE PROSPECTS OF UTILIZATION OF SOLAR ENERGY IN VARIOUS FORMS ARE DISCUSSED.
Keywords: HEAT TRANSFER; TURBINE BLADES; WIND TUNNEL NOZZLES; BOUNDARY LAYERS; GAS TURBINES; TURBULENT FLOW
|Active microwave remote sensing of oceans, chapter 3 - NON|
A rationale is developed for the use of active microwave sensing in future aerospace applications programs for the remote sensing of the world's oceans, lakes, and polar regions. Summaries pertaining to applications, local phenomena, and large-scale phenomena are given along with a discussion of orbital errors.
Keywords: AIR INTAKES; COWLINGS; ENGINE DESIGN; LEADING EDGES; BOUNDARY LAYERS; HYPERSONIC FLOW; INTAKE SYSTEMS
|Equal-Curvature X-Ray Telescopes - Saha, Timo T.|
We introduce a new type of x-ray telescope design; an Equal-Curvature telescope. We simply add a second order axial sag to the base grazing incidence cone-cone telescope. The radius of curvature of the sag terms is the same on the primary surface and on the secondary surface. The design is optimized so that the on-axis image spot at the focal plane is minimized. The on-axis RMS (root mean square) spot diameter of two studied telescopes is less than 0.2 arc-seconds...
Keywords: ATMOSPHERIC GENERAL CIRCULATION MODELS; OPTICAL PROPERTIES; DUST STORMS; AEROSOLS; ATMOSPHERIC CIRCULATION; BOUNDARY LAYERS; DIFFUSIVITY; FEEDBACK
|Solutions Network Formulation Report. Landsat Data Continuity Mission Simulated Data Products for Bureau of Land Management and Environmental Protection Agency Abandoned Mine Lands Decision Support - Estep, Lelan|
Presently, the BLM (Bureau of Land Management) has identified a multitude of abandoned mine sites in primarily Western states for cleanup. These sites are prioritized and appropriate cleanup has been called in to reclaim the sites. The task is great in needing considerable amounts of agency resources. For instance, in Colorado alone there exists an estimated 23,000 abandoned mines. The problem is not limited to Colorado or to the United States...
Keywords: BOUNDARY LAYER TRANSITION; CORRELATION; THERMAL STRESSES; AEROTHERMODYNAMICS; CALIBRATING; LEADING EDGES; TURBULENCE; BOUNDARY LAYERS; THERMAL PROTECTION; PROTUBERANCES
|EVALUATION OF TAKEOFF AND LANDING PERFORMANCE OF COMMERCIAL STOL AIRPLANES - CALCARA, M|
THE BASIC REQUIREMENTS FOR COMMERCIAL STOL AIRPLANES LEADING TO THE USE OF HIGH BY-PASS RATIO TURBOFANS AND VERY ADVANCED HIGH-LIFT SYSTEMS ARE BRIEFLY REVIEWED. WITH THE METHOD DEVELOPED, A RAPID EVALUATION OF TAKEOFF AND LANDING PERFORMANCE MAY BE MADE WHICH PERMITS AN EASY COMPARISON OF DIFFERENT CONFIGURATIONS. THE METHOD TAKES INTO ACCOUNT: SAFETY REQUIREMENTS (SPEED MANEUVERING MARGIN, CRITICAL ENGINE FAILURE AT TAKEOFF, LANDING FIELD LENGTH FACTOR), PASSENGER COMFORT AND PILOT LIMITATIONS...
Keywords: BOUNDARY LAYERS; FLIGHT VEHICLES; MEASURING INSTRUMENTS; WAKES; CATALOGS (PUBLICATIONS); PRESSURE MEASUREMENT; SHEAR STRESS; VELOCITY MEASUREMENT
|Summary of Available Data Relating to Reynolds Number Effects on the Maximum Lift Coefficients of Swept-Back Wings - Sweberg, Harold H.|
The available foreign and American data relating to Reynolds number effects on the maximum lift coefficients of swept-back wings are summarized and discussed. The data show that at low Reynolds numbers (below about 2.0 x 10(exp 6)) higher maximum lift coefficients were measured in most cases for moderately swept-back wings than for unswept wings of similar plan form; at high Reynolds numbers, however, increasing sweepback resulted in decreasing maximum lift coefficients...
Keywords: PRESSURE GRADIENTS; BOUNDARY LAYERS; PERTURBATION; PRESSURE DISTRIBUTION; AIRFOILS; INCOMPRESSIBLE FLUIDS; LOW REYNOLDS NUMBER; AMPLIFICATION; TURBINES
|Saturn, 1959 - NON|
In October 1958, the National Aeronautics and Space Agency (NASA) was asked to absorb the Army Ballistic Missile Agency (ABMA) space group, but an agreement was reached two months later for the group to remain with the Army while being responsive to NASA. This decision was to be reconsidered and reversed within a year. The competition in large launch vehicles between NASA, ARPA (Advanced Research Projects Agency), Air Force, and Army begun in 1958, continued into 1959...
Keywords: AERODYNAMICS; BOUNDARY LAYERS; SEPARATED FLOW; AXISYMMETRIC FLOW; BOUNDARY CONDITIONS; COMPUTATION; INVISCID FLOW; NUMERICAL ANALYSIS; VISCOUS FLOW
|Water Surface Currents, Short Gravity-Capillary Waves and Radar Backscatter - Atakturk, Serhad S.|
Despite their importance for air-sea interaction and microwave remote sensing of the ocean surface, intrinsic properties of short gravity-capillary waves are not well established. This is largely due to water surface currents and their effects on the direct measurements of wave parameters conducted at a fixed point. Frequencies of small scale waves propagating on a surface which itself is in motion, are subject to Doppler shifts...
Keywords: SEMISPAN MODELS; AERODYNAMIC CONFIGURATIONS; TAKEOFF; WIND TUNNEL TESTS; LIFT; TRANSPORT AIRCRAFT; BOUNDARY LAYERS; AERODYNAMIC COEFFICIENTS
|Solar cell performance, mathematical model Quarterly report, 1 Dec. 1969 - 28 Feb. 1970 - Barrett, M. J.|
Mathematical model for performance prediction of silicon solar cell in space environment
Keywords: ABLATIVE MATERIALS; PYROLYSIS; THERMAL DEGRADATION; BOUNDARY LAYERS; CHEMICAL ANALYSIS; COMPOSITE MATERIALS; HEAT SHIELDING; POLYMERIZATION
|Boundary layer relationships resulting from an approximation of the viscosity of equilibrium dissociating air - Demyanov, Yu. A.|
Boundary layer relationships resulting from approximation of viscosity of equilibrium dissociating air
Keywords: BOUNDARY LAYERS; ENTHALPY; EQUILIBRIUM FLOW; GAS DISSOCIATION; GAS VISCOSITY; BOUNDARY LAYER; EQUILIBRIUM FLOW; GAS DISSOCIATION; VISCOSITY
|Preliminary analysis of performance of turbojet engines used as pumps for boundary-layer control - Conrad, E. W|
No Abstract Available
Keywords: AERODYNAMIC DRAG; AIRFOILS; BOUNDARY LAYERS; FLIGHT TESTS; BOUNDARY LAYER TRANSITION; LAMINAR FLOW; REYNOLDS NUMBER
|A communication link between the GIM data base and a general application program - Argo, W. V|
Utilizing the extract verb of GIM causes the requested information to be extracted from the GIM base and written on to tape. When the GIM extract has completed, a FORTRAN program is then compiled and executed. This program reads the tape generated by GIM, formats and prints the extracted data on the line printer. When an end of file on the extracted tape is encountered the job is terminated.
Keywords: BOUNDARY LAYERS; COMPUTER TECHNIQUES; FLORIDA; OCEAN CURRENTS; ATMOSPHERIC SCATTERING; EREP; MICROORGANISMS; MULTISPECTRAL PHOTOGRAPHY; SKYLAB PROGRAM
|On the flow of a conducting fluid around a magnetized body - Kulikovskii, A. G|
No Abstract Available
Keywords: REATTACHED FLOW; SUPERSONIC FLOW; TWO DIMENSIONAL FLOW; BACKWARD FACING STEPS; BOUNDARY LAYERS; SEPARATED FLOW
|On the Theory of Thin Shallow Shells - Nazarov, A. A|
This report is concerned with the theory of thin shallow shells. It does not employ the lines of curvature as the coordinate system, but employs ''almost cartesian coordinates'' or the coordinates obtained by cutting the surface into two mutually orthogonal systems of parallel planes.
Keywords: SUPERSONIC BOUNDARY LAYERS; NAVIER-STOKES EQUATION; ROUGHNESS; REYNOLDS NUMBER; SOUND WAVES; FREQUENCY STABILITY; EIGENVECTORS
|INVESTIGATION OF STATIC PRESSURES AND BOUNDARY-LAYER CHARACTERISTICS ON THE FORWARD PARTS OF NINE FUSELAGES OF VARIOUS CROSS-SECTIONAL SHAPES AT M INFINITY EQUAL 2.01 - Hasel, L. E.|
Boundary layer characteristics of fuselages of various cross sectional shapes at static pressure
Keywords: ANGLE OF ATTACK; BOUNDARY LAYERS; FUSELAGES; SHAPES; STATIC PRESSURE; BOUNDARY LAYER; FUSELAGE; STATIC PRESSURE
|Comparison of Rolling Moment Characteristics During Roll Oscillations for a Low and a High Aspect Ratio Configuration - Brandon, Jay M.|
Improvements in testing and modeling of nonlinear and unsteady aerodynamic effects for flight dynamics predictions of vehicle performance is critical to enable the design and implementation of new, innovative vehicle concepts. Any configuration which exhibits significant flow separation, nonlinear aerodynamics, control interactions or attempts maneuvering through one or more conditions such as these is, at present, a challenge to test, model or predict flight dynamic responses prior to flight...
Keywords: AIRFOILS; EDDY VISCOSITY; STRESS ANALYSIS; TURBULENCE MODELS; FLOW DISTRIBUTION; NONLINEARITY; TURBULENT FLOW; BOUNDARY LAYERS
|The NASA/Army Autonomous Rotorcraft Project - Whalley, M.|
An overview of the NASA Ames Research Center Autonomous Rotorcraft Project (ARP) is presented. The project brings together several technologies to address NASA and US Army autonomous vehicle needs, including a reactive planner for mission planning and execution, control system design incorporating a detailed understanding of the platform dynamics, and health monitoring and diagnostics. A candidate reconnaissance and surveillance mission is described...
Keywords: AERODYNAMIC DRAG; DRAG REDUCTION; SUCTION; SHOCK WAVES; BOUNDARY LAYER SEPARATION; TRANSONIC SPEED; BOUNDARY LAYERS
|Data for NASA's AVE 6 experiment: 25-mb sounding data and synoptic charts - Dupuis, L. R.|
The Atmospheric Variability Experiments 6 experiment is described, and tabulated rawinsonde data at 25-mb intervals from the surface to 25 mb for the 22 stations participating in the experiment is presented. Soundings were taken between 0000 GMT 27 May and 1200 GMT 28 May 1977. The methods of data processing and their accuracy are briefly discussed. Synoptic charts prepared from the data are presented together with an example of contact data.
Keywords: AIRCRAFT HAZARDS; DYNAMIC MODELS; WIND SHEAR; BOUNDARY LAYERS; THUNDERSTORMS; WIND VELOCITY
|THE SPECTRAL DISTRIBUTION OF THE LUMINANCE COEFFICIENT OF THE SEA IN WATERS WITH DIVERSE OPTICAL PROPERTIES - KHALEMSKIY, E. N|
THE HYDROOPTICAL CHARACTERISTICS WHICH EXERT AN INFLUENCE ON THE COEFFICIENT OF SEA LUMINANCE ARE CONSIDERED. THESE INCLUDE THE ABSORPTION INDEX, THE INDEX OF BACKWARD REFRACTION, AS WELL AS THE CONCENTRATION OF SUSPENDED PARTICLES IN THE SEA WATER, THUS THE TRANSPARENCY OF THE WATER. THE EMPIRICAL RESULTS OF SPECTRAL DISTRIBUTION AND THE DEPENDENCE OF THE LUMINANCE COEFFICIENT ON TRANSPARENCY ARE PRESENTED.
Keywords: AIR WATER INTERACTIONS; DIFFUSE RADIATION; BOUNDARY LAYERS; ISOTROPY; LIGHT SCATTERING; OCEANS; RADIANT FLUX DENSITY; RADIATION DISTRIBUTION
|NASA Earth Resources Technology Satellite - Data user's handbook - NON|
No Abstract Available
Keywords: AERODYNAMIC CHARACTERISTICS; HIGH SPEED; AERODYNAMIC HEATING; AIRCRAFT CONFIGURATIONS; ARTIFICIAL SATELLITES; BOUNDARY LAYERS; MANNED SPACECRAFT; MISSILES; REENTRY
|Engine/airframe compatibility studies for supersonic cruise aircraft - NON|
Technology assessment studies were conducted to provide an updated technology base from which an advanced supersonic cruise aircraft can be produced with a high probability of success. An assessment of the gains available through the application of advanced technologies in aerodynamics, propulsion, acoustics, structures, materials, and active controls is developed. The potential market and range requirements as well as economic factors including payload, speed, airline operating costs, and airli...
Keywords: BOUNDARY LAYERS; MULTISPECTRAL BAND SCANNERS; OCEAN CURRENTS; EREP; INFRARED RADIATION; SKYLAB PROGRAM; UPWELLING WATER
|Fluid Mechanics - L.D. Landau & E.M. Lifshitz|
L.D. Landau & E.M. Lifshitz Fluid Mechanics ( Volume 6 of A Course of Theoretical Physics ) Pergamon Press 1959 Acrobat 7 Pdf 24.8 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Physics; Ideal Fluids; Viscous; Turbulence; Boundary Layers; Diffusion; Shock Waves; Superfluids
Downloads: 15,582 (1 review)
|Gimbaled, partially submerged rocket nozzle Patent - Brown, R. L|
Gimbaled partially submerged nozzle for solid propellant rocket engines for providing directional control
Keywords: BOUNDARY LAYERS; ELECTRODES; MAGNETOHYDRODYNAMIC STABILITY; PLASMA TEMPERATURE; ELECTRIC CURRENT; ELECTRIC FIELDS; HALL EFFECT; MAGNETIC FIELDS
|Preliminary results of observations of the ionospheric effect during the solar eclipse of 15 February 1961 - Shashunkina, V. M., et al|
No Abstract Available
Keywords: E REGION; GEOMAGNETISM; BOUNDARY LAYERS; EARTH (PLANET); MAXWELL EQUATION; PLANETARY MAGNETIC FIELDS
|BOUNDARY-LAYER DISPLACEMENT EFFECTS IN AIR AT MACH NUMBERS OF 6.8 AND 9.6 - Bertram, M. H|
Boundary layer displacement effects in air at mach 6.8 and 9.6
Keywords: BOUNDARY LAYERS; DISPLACEMENT; HYPERSONIC BOUNDARY LAYER; HYPERSONIC SPEED; MACH NUMBER; REYNOLDS NUMBER; BOUNDARY LAYER; DISPLACEMENT; HYPERSONIC BOUNDARY LAYER
|Stressed-Oxidation Lifetime of Different SiC Fiber, CVI Matrix SiC Minicomposites in Air - Morscher, Gregory N.|
The stressed-oxidation lifetime properties of several minicomposites composed of single fiber tows with a CVI SiC matrix were compared. The minicomposites were made up of Nicalon(Tm) and Hi-Nicalon(Tm) SiC fibers with carbon or BN interphases. Constant load stress-rupture tests were performed between 600 and 13000 C in air for all of the minicomposite systems. Cyclic load testing was performed on the Hi-Nicalon minicomposite systems...
Keywords: CHEMICAL ANALYSIS; VAPORIZING; RECESSION; BOUNDARY LAYERS; CHEMICAL REACTIONS; VOLATILITY; THERMOCHEMISTRY; SILICON DIOXIDE; FUEL COMBUSTION; CHEMICAL PROPERTIES; CHEMICAL TESTS; WATER VAPOR
|Introductory Remarks - Tenney, Darrel R|
Future vehicle designs will see a paradigm shift from: 1) Steady to the unsteady world (e.g. flow control, adaptive morphing); 2) Passive to active; 3) Rigid designs to exploitation of flexibility and adaptability; 4) Few discrete to numerous distributed (e.g. sensors, control surfaces); 5) To obtain a vehicle that is always at optimum performance. Therefore, future designs will be inherently multidisciplinary, and the greatest technical challenges and opportunities occur at the intersection of ...
Keywords: SURFACE ROUGHNESS; GLAZES; ICE; CROSS FLOW; BOUNDARY LAYERS; ICE FORMATION; STABILITY TESTS; PRANDTL-MEYER EXPANSION; CAUCHY INTEGRAL FORMULA
|The Role of Ontologies in Schema-based Program Synthesis - Bures, Tomas|
Program synthesis is the process of automatically deriving executable code from (non-executable) high-level specifications. It is more flexible and powerful than conventional code generation techniques that simply translate algorithmic specifications into lower-level code or only create code skeletons from structural specifications (such as UML class diagrams). Key to building a successful synthesis system is specializing to an appropriate application domain...
Keywords: ENGINE NOISE; SENSITIVITY; NOISE MEASUREMENT; ENGINE INLETS; COMPUTATIONAL FLUID DYNAMICS; NOISE REDUCTION; BOUNDARY LAYERS; GRAZING INCIDENCE; LININGS; PARALLEL FLOW; DEGRADATION
|Performance Monitoring and Assessment of Neuro-Adaptive Controllers for Aerospace Applications Using a Bayesian Approach - Gupta, Pramod|
Modem aircraft, UAVs, and robotic spacecraft pose substantial requirements on controllers in the light of ever increasing demands for reusability, affordability, and reliability. The individual systems (which are often nonlinear) must be controlled safely and reliably in environments where it is virtually impossible to analyze-ahead of time- all the important and possible scenarios and environmental factors...
Keywords: AEROELASTICITY; OSCILLATIONS; AIRFOIL OSCILLATIONS; AIRFOIL PROFILES; BOUNDARY LAYER SEPARATION; TRANSONIC FLUTTER; UNSTEADY AERODYNAMICS; BOUNDARY LAYERS; DATA REDUCTION; CAVITIES
|Increasing Density and Reducing Costs of Data Acquisition - Schmalzel, J. L.|
There are a number of reasons why it is important to increase the density of data acquisition functions. Sensor fusion seeks to integrate large numbers of sensors into a decision network. Addition of health monitoring functions may incur additional sensor requirements. But at the same time, it is important to reduce the per-channel costs of data acquisition systems. Often the most significant cost is the management of data acquisition networks, which incurs substantial costs associated with tran...
Keywords: BOUNDARY LAYERS; AERIAL RECONNAISSANCE; DUST; FLOW DISTRIBUTION; METEOROLOGY; WEATHER; CARIBBEAN REGION; OPTICAL THICKNESS; SAHARA DESERT (AFRICA); PUERTO RICO
|THEORY OF THE MOTION OF A BODY WITH CAVITIES PARTLY FILLED WITH A LIQUID - OKHOTSIMSKII, D. E|
PRESENTED ARE A DERIVATION AND DISCUSSION OF FORCES ASSOCIATED WITH SMALL MOTION OF A RIGHT CIRCULAR CYLINDER CONTAINING FLUID WITH A FREE SURFACE. FOR IMPULSIVE MOTION, SIMPLE HARMONIC MOTION, AND MOTION JUST BEGINNING IT IS SHOWN THAT THE BODY OF FLUID POSSESSES INERTIAL CHARACTERISTICS SIMILAR TO THE MASS, MOMENT OF INERTIA, AND CENTER OF MASS OF A RIGID BODY. SUGGESTIONS ARE GIVEN FOR ESTABLISHING THE GENERAL EQUATIONS OF MOTION OF THE SYSTEM.
Keywords: BOUNDARY LAYER EQUATIONS; PRANDTL NUMBER; BOUNDARY CONDITIONS; SUPERSONIC FLOW; KINETIC THEORY; RAREFIED GASES; PRESSURE GRADIENTS; DERIVATION; BOUNDARY LAYERS; MAXWELL EQUATION